<template>
    <input type="text" v-model="val">
    <button @click="handleAdd">点击</button>
</template>
<script setup>
import {ref ,defineEmits} from "vue"

// 声明自定义事件 完成子传父

let val = ref("")

let emit = defineEmits(['add'])

let handleAdd = () =>{
    emit('add',val.value)
}
</script>